Most laptops come loaded with different display utilities to help you display your screen contents onto and external projector. Windows 7 simplifies this job.
External projector Display options
To get your notebook display onto an external projector in Windows 7, simply run displayswitch.exe and hit Enter or click the Win+P shortcut key. This will bring up the following window:
Choose the option you want:
– Show desktop only on computer display
– Duplicate desktop on projector
– Extend desktop to projector
– Show desktop only on projector
To have more control over the presentation setting, press Win+X to open the Windows Mobility Center.